class_docstr: Samples elements from [0, length) randomly without replacement.
  
  Parameters
  ----------
  length : int
      Length of the sequence.
code: def __iter__(self):
      indices = np.arange(self._length)
      np.random.shuffle(indices)
      return iter(indices)
  
imports: import numpy
label_desc: Use image node_id 2 for calling the RandomSampler obj's underlying member method code with example usage: obj.__iter__() and returns: iter